Question

which gas is used to prevent rancidity in potato chips packets

Answer 1

Answer:

nitrogen gas

You may notice that when you open a new bag of potato chips, half of the bag is filled with "air". That air is actually nitrogen gas. Nitrogen is an inert gas, and is used during the packaging process to exclude and remove air and in particular, oxygen.

Answer 2

Answer:

Nitrogen

Potato chips packets are flushed with nitrogen to prevent rancidity. Nitrogen prevents the oxidation of the fats and oils.